The weekly earning is an illustration of a linear function.
Her total earning when she sells a good worth $4800 is $637
The given parameters are:
[tex]\mathbf{Base = 325}[/tex]
[tex]\mathbf{Commission = 6.5\%}[/tex]
Let the total sales be x and the total earnings be y.
So, we have:
[tex]\mathbf{y = Base + Commission \times x}[/tex]
Substitute known values
[tex]\mathbf{y = 325 + 6.5\% \times x}[/tex]
When she sold merchandise worth $4800, it means that x = 4800
So, we have:
[tex]\mathbf{y = 325 + 6.5\% \times 4800}[/tex]
[tex]\mathbf{y = 325 + 312}[/tex]
[tex]\mathbf{y = 637}[/tex]
Hence, her total earning is $637
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